Do amino acids always exist as Zwitterions?

Related questions

1. Why are proteins called amphoteric?
2. What gives amino acids their individual properties?
3. What are the 10 essential amino acids?
4. How does a zwitterion form?
5. What are the three properties used to classify amino acids?
6. What makes each amino acid unique?
7. Are all amino acids Zwitterions?
8. What determines the unique properties of each amino acid?
9. What are the 4 amino acids in DNA?
10. What is the role of amino acids?

Tags

1. #known
2. #least
3. #positive
4. #functional
5. #entire
6. #groups
7. #acids
8. #charge
9. #molecule
10. #electrical
11. #which
12. #examples
13. #negative
14. #amino
15. #zwitterions
16. #zwitterion